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167 lines
5.8 KiB
167 lines
5.8 KiB
(ns formulare.core
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(:require [formulare.theme :as theme]
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[clojure.spec.alpha :as spec]
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[clojure.spec.test.alpha :as spectest]
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[hiccup
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[form :as hform]
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[core :as hcore]]
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[ring.util.anti-forgery :refer [anti-forgery-field]]))
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(spec/def ::label string?)
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(spec/def ::required boolean?)
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(spec/def ::spec
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(spec/or :registered-spec keyword?
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:predicate ifn?))
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(spec/def ::options
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(spec/or :empty empty?
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:options (spec/coll-of (spec/tuple string? string?))))
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(spec/def ::widget
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#{:input :select :checkbox :textarea :mselect :hidden})
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(spec/def ::from-req ifn?)
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(spec/def ::to-form ::from-req)
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(spec/def ::attrs (spec/map-of keyword? (fn [_] true)))
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(spec/def ::field
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(spec/keys :opt-un [::label
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::options
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::widget
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::from-req
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::to-form
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::required
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::spec
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::attrs]))
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(spec/def ::fields
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(spec/map-of keyword? ::field))
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(spec/def ::form-specs
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(spec/coll-of ::spec))
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(spec/def ::form
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(spec/keys :req-un [::fields]
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:opt-un [::form-specs]))
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(defn form-data [form-def req]
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(reduce (fn [coll [id field]]
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(let [value (get-in req [:params id])]
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(assoc coll
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id
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(if-let [from-req (:from-req field)]
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(from-req value)
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value))))
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{}
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(:fields form-def)))
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(spec/fdef form-data
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:args (spec/cat :form-def ::form :req map?)
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:ret map?)
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(spectest/instrument `form-data)
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(defn form-specs-valid? [form-def req]
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(reduce (fn [valid? form-spec]
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(if (spec/valid? form-spec req)
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true
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(reduced false)))
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true
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(:form-specs form-def)))
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(defn field-specs-valid? [form-def req]
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(reduce-kv
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(fn [result field field-def]
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(if-let [field-spec (:spec field-def)]
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(if (spec/valid? field-spec (get-in req [:params field]))
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true
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(reduced false))
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result))
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true
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(:fields form-def)))
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(defn valid? [form-def req]
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(let [data (form-data form-def req)]
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(and (field-specs-valid? form-def req)
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(form-specs-valid? form-def req))))
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(spec/fdef valid?
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:args (spec/cat :form-def ::form :req map?)
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:ret map?)
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(spectest/instrument `valid?)
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(def ^:dynamic *row-theme* theme/row)
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(def ^:dynamic *widget-error-theme* theme/widget-error)
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(def ^:dynamic *form-error-theme* theme/form-error)
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(def ^:dynamic *label-theme* theme/label)
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(def ^:dynamic *input-widget-theme* theme/input-widget)
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(def ^:dynamic *checkbox-widget-theme* theme/checkbox-widget)
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(def ^:dynamic *textarea-widget-theme* theme/textarea-widget)
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(def ^:dynamic *select-widget-theme* theme/select-widget)
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(def ^:dynamic *mselect-widget-theme* theme/multiselect-widget)
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(def ^:dynamic *hidden-widget-theme* theme/hidden-widget)
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(defn widget-markup [values req validate? [id def]]
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(let [{:keys [spec widget to-form]} def
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value ((or to-form identity) (id values))
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req-value (get-in req [:params id])
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renderer (case widget
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:checkbox *checkbox-widget-theme*
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:textarea *textarea-widget-theme*
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:select *select-widget-theme*
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:mselect *mselect-widget-theme*
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:hidden *hidden-widget-theme*
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*input-widget-theme*)]
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(*row-theme* (when (and validate?
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spec
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(not (spec/valid? spec req-value)))
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(*widget-error-theme* id def req-value))
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(*label-theme* id def)
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(renderer id def (if validate? req-value value)))))
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(defn form-hash [form-def values]
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(str (hash [form-def values])))
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(defn validate? [form-def values req]
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(= (form-hash form-def values)
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(get-in req [:params :__form-hash])))
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(defn render-widgets
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([form-def values req]
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(render-widgets form-def values req
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{:render-anti-forgery-field? true}))
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([form-def values req {raff? :render-anti-forgery-field?}]
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(let [validate? (validate? form-def values req)
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form-errors (when (and validate?
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(not (form-specs-valid? form-def
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req)))
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(*form-error-theme* form-def req))
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widget-mapper (partial widget-markup values req validate?)
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defined-widgets (map widget-mapper (:fields form-def))
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hash-field (hform/hidden-field "__form-hash"
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(form-hash form-def values))
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all-widgets (conj defined-widgets
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hash-field)
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all-widgets (if raff?
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(conj all-widgets (anti-forgery-field))
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all-widgets)]
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(if form-errors
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(concat (if (sequential? form-errors)
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form-errors
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[form-errors])
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all-widgets)
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all-widgets))))
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(spec/def ::render-anti-forgery-field?
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#(boolean? (boolean %)))
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(spec/def ::options-map
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(spec/keys :req-un
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[::render-anti-forgery-field?]))
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(spec/fdef render-widgets
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:args (spec/or :three-params
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(spec/cat :form-def ::form
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:values (spec/or :no-values nil?
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:values map?)
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:req map?)
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:four-params
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(spec/cat :form-def ::form
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:values (spec/or :no-values nil?
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:values map?)
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:req map?
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:options ::options-map)))
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(spectest/instrument `render-widgets)
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